Subtract 10/8 from 15/40
1st number: 15/40, 2nd number: 1 2/8
15/40 - 10/8 is -7/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
10/8 = 10 × 5/8 × 5 = 50/40 - Subtract the two like fractions:
15/40 - 50/40 = 15 - 50/40 = -35/40 - After reducing the fraction, the answer is -7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40-10/8 15/40-20/8 15/80-10/8 15/40-10/16 45/40-10/8 15/40-30/8 15/40-10/24 75/40-10/8 15/40-50/8 15/40-10/40 15/40-70/8 15/40-10/56